Ji Hwan Cha Professor

Department of Statistics

차지환 프로필 사진
Professor Ji Hwan Cha received his B.S. degree in Computer Science and Statistics from Seoul National University, Korea, in 1993; and his M.S., and Ph.D. degrees in Statistics from Seoul National University in 1995, and 1999, respectively. He is a Full Professor at the Department of Statistics, Ewha Womans University, Seoul, Korea. He is an associate editor of the Methodology and Computing in Applied Probability. He has published about 156 papers (up to Feb. 2024) in various international journals such as Journal of Applied Probability and Advances in Applied Probability. His research interests include applied probability, stochastic models for machine learning, temporal point process-based reinforcement learning, reliability theory, stochastic processes, stochastic operations research, and management science. He has published (co-authored with Dr. Maxim Finkelstein) two books entitled “Stochastic Modeling for Reliability: Shocks, Burn-in and Heterogeneous Populations” (2013, Springer), and  “Point Processes for Reliability Analysis” (2018, Springer).
  • Science Building B #B520
  • 02-3277-6856
  • Office hours
    • 월, 화 오후 1시-오후 5시
Research Record
  • An advanced acceptance reliability sampling plan for heterogeneous items subject to external shocks IMA Journal of Management Mathematics, 2024, v.35 no.2, 197-213
    SCIE SSCI Scopus dColl.
  • On the multiattempt minimal repair and the corresponding counting process Applied Stochastic Models in Business and Industry, 2024, v.40 no.1, 206-215
    SCIE Scopus dColl.
  • Poisson generalized Lindley process and its properties Metrika, 2024, v.87 no.1, 61-74
    SCIE Scopus dColl.
  • Preservation of the log concavity by Bernstein operator with an application to ageing properties of a coherent system Journal of Computational and Applied Mathematics, 2024, v.443, 115748
    SCIE Scopus dColl.
  • Preventive maintenance for the constrained multi-attempt minimal repair Reliability Engineering and System Safety, 2024, v.243, 109899
    SCIE Scopus dColl.
  • Acceptance reliability sampling plan for items from heterogeneous populations Proceedings of the Institution of Mechanical Engineers, Part O: Journal of Risk and Reliability, 2023, v.237 no.6, 1199-1208
    SCIE Scopus dColl.
  • Improving classical optimal age-replacement policies for degrading items Reliability Engineering and System Safety, 2023, v.236, 109303
    SCIE Scopus dColl.
  • Improving the age composition of dynamic populations of manufactured items Statistics and Probability Letters, 2023, v.201, 109879
    SCIE Scopus dColl.
  • Optimal preventive maintenance strategy for populations of systems that generate outputs Reliability Engineering and System Safety, 2023, v.237, 109334
    SCIE Scopus dColl.
  • Termination versus operation extension for degrading systems Proceedings of the Institution of Mechanical Engineers, Part O: Journal of Risk and Reliability, 2023, v.237 no.6, 1175-1185
    SCIE Scopus dColl.
  • A Preventive Replacement Policy for a System Subject to Bivariate Generalized Polya Failure Process Mathematics, 2022, v.10 no.11, 1833
    SCIE Scopus dColl.
  • A new class of marginally regular multivariate counting processes generated by the mixture of multivariate Poisson processes Communications in Statistics - Theory and Methods, 2022, v.51 no.13, 4235-4251
    SCIE Scopus dColl.
  • A new warranty policy for heterogeneous items subject to monotone degradation processes Proceedings of the Institution of Mechanical Engineers, Part O: Journal of Risk and Reliability, 2022, v.236 no.1, 55-65
    SCIE Scopus dColl.
  • AN EXTENDED CLASS OF UNIVARIATE AND MULTIVARIATE GENERALIZED POLYA PROCESSES ADVANCES IN APPLIED PROBABILITY, 2022, v.54 no.3, 974-997
    SCIE Scopus dColl.
  • Age-replacement policy for items described by stochastic degradation with dependent increments IMA JOURNAL OF MANAGEMENT MATHEMATICS, 2022, v.33 no.2, 273-287
    SCIE SSCI Scopus dColl.
  • Balancing load and performance for different failure models Applied Stochastic Models in Business and Industry, 2022, v.38 no.2, 323-333
    SCIE Scopus dColl.
  • On a hazard (failure) rate process with delays after shocks Statistics and Probability Letters, 2022, v.181, 109276
    SCIE Scopus dColl.
  • Optimal preventive switching of components in degrading systems RELIABILITY ENGINEERING & SYSTEM SAFETY, 2022, v.219, 108266
    SCIE Scopus dColl.
  • Reducing degradation and age of items in imperfect repair modeling Test, 2022
    SCIE Scopus dColl.
  • Replacement Policy for Heterogeneous Items Subject to Gamma Degradation Processes Methodology and Computing in Applied Probability, 2022, v.24 no.3, 1323-1340
    SCIE Scopus dColl.
  • Two Reliability Acceptance Sampling Plans for Items Subject to Wiener Process of Degradation Methodology and Computing in Applied Probability, 2022, v.24 no.3, 1651-1668
    SCIE Scopus dColl.
  • A general multivariate new better than used (MNBU) distribution and its properties METRIKA, 2021, v.84 no.1, 27-46
    SCIE Scopus dColl.
  • On a multivariate IFR and positively dependent lifetime model induced by multiple shot-noise processes Statistical Papers, 2021, v.62 no.2, 561-590
    SCIE Scopus dColl.
  • On dynamic information-based life extension Proceedings of the Institution of Mechanical Engineers, Part O: Journal of Risk and Reliability, 2021, v.235 no.4, 690-699
    SCIE Scopus dColl.
  • Optimal inspection for missions with a possibility of abortion or switching to a lighter regime TOP, 2021, v.29 no.3
    SCIE Scopus dColl.
  • Optimal warranty policy with inspection for heterogeneous, stochastically degrading items European Journal of Operational Research, 2021, v.289 no.3, 1142-1152
    SCIE Scopus dColl.
  • Poisson generalized gamma process and its properties Stochastics, 2021, 11 Jan 2021
    SCIE Scopus dColl.
  • Rejoinder to "Virtual age, is it real?" APPLIED STOCHASTIC MODELS IN BUSINESS AND INDUSTRY, 2021 , 45-52
    SCIE Scopus dColl.
  • Variables acceptance reliability sampling plan based on degradation test Statistical Papers, 2021, v.62 no.5, 2227-2245
    SCIE Scopus dColl.
  • Variables acceptance reliability sampling plan for items subject to inverse Gaussian degradation process Journal of Applied Statistics, 2021, v.48 no.3, 393-409
    SCIE Scopus dColl.
  • Virtual age, is it real? - Discussing virtual age in reliability context Applied Stochastic Models in Business and Industry, 2021, v.37 no.1, 3-16
    SCIE Scopus dColl.
  • A hybrid preventive maintenance model for systems with partially observable degradation IMA JOURNAL OF MANAGEMENT MATHEMATICS, 2020, v.31 no.3, 345-365
    SCIE SSCI Scopus dColl.
  • A new general class of discrete bivariate distributions constructed by using the likelihood ratio Statistical Papers, 2020, v.61 no.3, 923-944
    SCIE Scopus dColl.
  • Is perfect repair always perfect? Test, 2020, v.29 no.1, 90-104
    SCIE Scopus dColl.
  • ON A MULTIVARIATE GENERALIZED POLYA PROCESS without REGULARITY PROPERTY Probability in the Engineering and Informational Sciences, 2020, v.34 no.4, 484-506
    SCIE Scopus dColl.
  • On a new age-replacement policy for items with observed stochastic degradation Quality and Reliability Engineering International, 2020, v.36 no.3, 1132-1143
    SCIE Scopus dColl.
  • On optimal life extension for degrading systems Proceedings of the Institution of Mechanical Engineers, Part O: Journal of Risk and Reliability, 2020, v.234 no.3, 487-495
    SCIE Scopus dColl.
  • Stochastic modelling of operational quality of k-out-of-n systems TOP, 2020, v.28 n.2, 0
    SCIE Scopus dColl.
  • A bivariate optimal replacement policy for a system subject to a generalized failure and repair process APPLIED STOCHASTIC MODELS IN BUSINESS AND INDUSTRY, 2019, v.35 no.3, 637-650
    SCIE Scopus dColl.
  • A new class of multivariate counting processes and its characterization Stochastics, 2019, v.91 no.3, 383-406
    SCIE Scopus dColl.
  • Application of the generalized Polya process to two types of shock models AIP Conference Proceedings, 2019, v.2116, 450026
    Scopus dColl.
  • New failure and minimal repair processes for repairable systems in a random environment APPLIED STOCHASTIC MODELS IN BUSINESS AND INDUSTRY, 2019, v.35 no.3, 522-536
    SCIE Scopus dColl.
  • On some characteristics of quality for systems operating in a random environment PROCEEDINGS OF THE INSTITUTION OF MECHANICAL ENGINEERS PART O-JOURNAL OF RISK AND RELIABILITY, 2019, v.233 no.2, 257-267
    SCIE Scopus dColl.
  • Optimal preventive maintenance for systems having a continuous output and operating in a random environment TOP, 2019, v.27 no.2, 327-350
    SCIE Scopus dColl.
  • Poisson Lindley process and its main properties Statistics and Probability Letters, 2019, v.152, 74-81
    SCIE Scopus dColl.
  • Some results on discrete mixture failure rates Communications in Statistics - Theory and Methods, 2019, v.48 no.15, 3884-3898
    SCIE Scopus dColl.
  • Stochastic modeling for systems with delayed failures Reliability Engineering and System Safety, 2019, v.188, 118-124
    SCIE Scopus dColl.
  • Stochastic modeling of quality of systems operating in a heterogeneous environment APPLIED STOCHASTIC MODELS IN BUSINESS AND INDUSTRY, 2019, v.35 no.6, 1344-1365
    SCIE Scopus dColl.
  • TRANSFORMED LEVY PROCESSES AS STATE-DEPENDENT WEAR MODELS ADVANCES IN APPLIED PROBABILITY, 2019, v.51 no.2, 468-486
    SCIE Scopus dColl.
  • A dynamic bivariate common shock model with cumulative effect and its actuarial application SCANDINAVIAN ACTUARIAL JOURNAL, 2018, v. no.10, 890-906
    SCIE SSCI Scopus dColl.
  • Advanced poisson shock models Springer Series in Reliability Engineering, 2018 , 111-168
    Scopus dColl.
  • Applications of the generalized Polya process Springer Series in Reliability Engineering, 2018 , 279-327
    Scopus dColl.
  • Applications of the mixed poisson process Springer Series in Reliability Engineering, 2018 , 351-390
    Scopus dColl.
  • Bivariate preventive maintenance of systems with lifetimes dependent on a random shock process European Journal of Operational Research, 2018, v.266 no.1, 122-134
    SCIE Scopus dColl.
  • Generalizations of renewal process Springer Series in Reliability Engineering, 2018 , 211-246
    Scopus dColl.
  • Generalized Polya process Springer Series in Reliability Engineering, 2018 , 247-278
    Scopus dColl.
  • Introduction Springer Series in Reliability Engineering, 2018 , 1-8
    Scopus dColl.
  • Modelling of Marginally Regular Bivariate Counting Process and its Application to Shock Model METHODOLOGY AND COMPUTING IN APPLIED PROBABILITY, 2018, v.20 no.4, 1137-1154
    SCIE Scopus dColl.
  • Multivariate generalized Polya process Springer Series in Reliability Engineering, 2018 , 329-350
    Scopus dColl.
  • ON OPTIMAL OPERATIONAL SEQUENCE OF COMPONENTS IN A WARM STANDBY SYSTEM JOURNAL OF APPLIED PROBABILITY, 2018, v.55 no.4, 1014-1024
    SCIE Scopus dColl.
  • On information-based residual lifetime in survival models with delayed failures STATISTICS & PROBABILITY LETTERS, 2018, v.137, 209-216
    SCIE Scopus dColl.
  • On optimal replacement of systems with failure rates described by a random jump process QUALITY AND RELIABILITY ENGINEERING INTERNATIONAL, 2018, v.34 no.8, 1590-1604
    SCIE Scopus dColl.
  • On preventive maintenance under different assumptions on the failure/repair processes QUALITY AND RELIABILITY ENGINEERING INTERNATIONAL, 2018, v.34 no.1, 66-77
    SCIE Scopus dColl.
  • Optimal mission abort policy for partially repairable heterogeneous systems European Journal of Operational Research, 2018, v.271 no.3, 818-825
    SCIE Scopus dColl.
  • Optimal replacement policy under a general failure and repair model: Minimal versus worse than old repair Reliability Engineering and System Safety, 2018, v.180, 362-372
    SCIE Scopus dColl.
  • Poisson process Springer Series in Reliability Engineering, 2018 , 73-110
    Scopus dColl.
  • Poisson shock model with applications to preventive maintenance Springer Series in Reliability Engineering, 2018 , 169-209
    Scopus dColl.
  • Preliminaries: Reliability and point processes Springer Series in Reliability Engineering, 2018 , 9-35
    Scopus dColl.
  • Renewal processes and applications Springer Series in Reliability Engineering, 2018 , 37-71
    Scopus dColl.
  • Shocks as the discrete scale Springer Series in Reliability Engineering, 2018 , 391-419
    Scopus dColl.
  • Stochastic comparisons and multivariate dependence for the epoch times of trend renewal processes JOURNAL OF MULTIVARIATE ANALYSIS, 2018, v.168, 174-184
    SCIE Scopus dColl.
  • UNIVARIATE AND MULTIVARIATE STOCHASTIC COMPARISONS AND AGEING PROPERTIES OF THE GENERALIZED POLYA PROCESS JOURNAL OF APPLIED PROBABILITY, 2018, v.55 no.1, 233-253
    SCIE Scopus dColl.
  • Bivariate preventive maintenance for repairable systems subject to random shocks Proceedings of the Institution of Mechanical Engineers, Part O: Journal of Risk and Reliability, 2017, v.231 no.6, 643-653
    SCIE Scopus dColl.
  • Modeling Discrete Bivariate Data with Applications to Failure and Count Data Quality and Reliability Engineering International, 2017, v.33 no.7, 1455-1473
    SCIE Scopus dColl.
  • Multivariate reliability modelling based on dependent dynamic shock models Applied Mathematical Modelling, 2017, v.51, 199-216
    SCIE Scopus dColl.
  • On a New Shot Noise Process and the Induced Survival Model Methodology and Computing in Applied Probability, 2017, v.20 n.3, 1-21
    SCIE Scopus dColl.
  • On bending (down and up) property of reliability measures in mixtures Metrika, 2017, v.80 no.4, 455-482
    SCIE Scopus dColl.
  • On optimal grouping and stochastic comparisons for heterogeneous items JOURNAL OF MULTIVARIATE ANALYSIS, 2017, v.160, 146-156
    SCIE Scopus dColl.
  • On preventive maintenance of systems with lifetimes dependent on a random shock process Reliability Engineering and System Safety, 2017, v.168, 90-97
    SCIE Scopus dColl.
  • Prediction of the residual failure processes based on the process history Communications in Statistics - Theory and Methods, 2017, v.46 no.13, 6336-6357
    SCIE Scopus dColl.
  • Reliability sampling plan for repairable items following general failure process and its statistical analysis Statistics, 2017, v.51 n.5, 1-20
    SCIE Scopus dColl.
  • Stochastic ordering for populations of manufactured items Test, 2017, v.27 n.1, 1-24
    SCIE Scopus dColl.
  • A new generalized burn-in procedure for items in stochastically evolving population Applied Mathematical Modelling, 2016, v.40 no.19-20
    SCIE Scopus dColl.
  • An information-based burn-in procedure for minimally repaired items from mixed population APPLIED STOCHASTIC MODELS IN BUSINESS AND INDUSTRY, 2016, v.32 no.4, 511-525
    SCIE Scopus dColl.
  • Dynamic mixing probability measures of mixtures Communications in Statistics - Theory and Methods, 2016, v.45 no.16, 4824-4839
    SCIE Scopus dColl.
  • Justifying the Gompertz curve of mortality via the generalized Polya process of shocks Theoretical Population Biology, 2016, v.109, 54-62
    SCIE Scopus dColl.
  • Maintenance Policy for a System With Stochastically Dependent Failure Modes With Shock-Accumulation Effect IEEE TRANSACTIONS ON RELIABILITY, 2016, v.65 no.3, 1284-1297
    SCIE Scopus dColl.
  • New stochastic models for preventive maintenance and maintenance optimization EUROPEAN JOURNAL OF OPERATIONAL RESEARCH, 2016, v.255 no.1, 80-90
    SCIE Scopus dColl.
  • On Ageing Concepts for Repairable Items From Heterogeneous Populations IEEE TRANSACTIONS ON RELIABILITY, 2016, v.65 no.4, 1864-1870
    SCIE Scopus dColl.
  • On a class of multivariate counting processes Advances in Applied Probability, 2016, v.48 no.2, 443-462
    SCIE Scopus dColl.
  • On information-based warranty policy for repairable products from heterogeneous population European Journal of Operational Research, 2016, 18 FEB 2016
    SCIE Scopus dColl.
  • On some properties of shock processes in a 'natural' scale Reliability Engineering and System Safety, 2016, v.145, 104-110
    SCIE Scopus dColl.
  • On stochastic comparisons for population age and remaining lifetime Statistical Papers, 2016, 1 MAR 2016, 1-15
    SCIE Scopus dColl.
  • Optimal Long-Run Imperfect Maintenance With Asymptotic Virtual Age IEEE TRANSACTIONS ON RELIABILITY, 2016, v.65 no.1, 187-196
    SCIE Scopus dColl.
  • Optimal Replacement of Heterogeneous Items With Minimal Repairs IEEE TRANSACTIONS ON RELIABILITY, 2016, v.65 no.2, 593-603
    SCIE Scopus dColl.
  • Point process approach to modeling and analysis of general cascading failure models Journal of Applied Probability, 2016, v.53 no.1, 174-186
    SCIE Scopus dColl.
  • 다중 동적 Competing Risks 모형을 갖는이변량 신뢰성 모형에 관한 연구 한국데이터정보과학회지, 2016, v.27 no.3, 711~724
    KCI dColl.
  • A dependent competing risks model for technological units subject to degradation phenomena and catastrophic failures Quality and Reliability Engineering International, 2015, v.32 n.2
    SCIE Scopus dColl.
  • A dynamic stress-strength model with stochastically decreasing strength METRIKA, 2015, v.78 no.7, 807-827
    SCIE Scopus dColl.
  • A stochastic failure model with dependent competing risks and its applications to condition-based maintenance Journal of Applied Probability, 2015, v.52 no.2, 558-573
    SCIE Scopus dColl.
  • Analysis of reliability characteristics in the acceptance sampling tests Journal of Applied Statistics, 2015, 30 DEC 2015, 1-18
    SCIE Scopus dColl.
  • BURN-IN PROCEDURE BASED ON A DEPENDENT COVARIATE PROCESS ADVANCES IN APPLIED PROBABILITY, 2015, v.47 no.2, 506-529
    SCIE Scopus dColl.
  • Construction of two new general classes of bivariate distributions based on stochastic orders Journal of Multivariate Analysis, 2015, v.142, 75-85
    SCIE Scopus dColl.
  • Environmental stress screening modelling, analysis and optimization RELIABILITY ENGINEERING & SYSTEM SAFETY, 2015, v.139, 149-155
    SCIE Scopus dColl.
  • New shock models based on the generalized Polya process European Journal of Operational Research, 2015, 4 DEC 2015
    SCIE Scopus dColl.
  • On Two General Classes of Discrete Bivariate Distributions American Statistician, 2015, v.69 no.3, 221-230
    SCIE Scopus dColl.
  • On some mortality rate processes and mortality deceleration with age Journal of Mathematical Biology, 2015, v.72 n.1-2
    SCIE Scopus dColl.
  • Optimal burn-in procedure for mixed populations based on the device degradation process history European Journal of Operational Research, 2015, 18 DEC 2015
    SCIE Scopus dColl.
  • Variables acceptance reliability sampling plan for repairable items Statistics, 2015, v.49 no.5, 1141-1156
    SCIE Scopus dColl.
  • A competing risks model with degradation phenomena and catastrophic failures International Journal of Performability Engineering, 2014, v.10 no.1, 63-74
    Scopus dColl.
  • Burn-in for Eliminating Weak Items in Heterogeneous Populations COMMUNICATIONS IN STATISTICS-THEORY AND METHODS, 2014, v.43 no.24, 5115-5129
    SCIE Scopus dColl.
  • CHARACTERIZATION OF THE GENERALIZED POLYA PROCESS AND ITS APPLICATIONS ADVANCES IN APPLIED PROBABILITY, 2014, v.46 no.4, 1148-1171
    SCIE Scopus dColl.
  • On construction of general classes of bivariate distributions JOURNAL OF MULTIVARIATE ANALYSIS, 2014, v.127, 151-159
    SCIE Scopus dColl.
  • On some conditional characteristics of hazard rate processes induced by external shocks Operations Research Letters, 2014, v.42 no.5, 325-331
    SCIE Scopus dColl.
  • Preservation of ageing classes in deterioration models with independent increments JOURNAL OF INEQUALITIES AND APPLICATIONS, 2014
    Scopus SCIE dColl.
  • Some notes on unobserved parameters (frailties) in reliability modeling RELIABILITY ENGINEERING & SYSTEM SAFETY, 2014, v.123, 99-103
    SCIE Scopus dColl.
  • Stochastic comparison of multivariate conditionally dependent mixtures JOURNAL OF MULTIVARIATE ANALYSIS, 2014, v.129 no., 82-94
    SCIE Scopus dColl.
  • Stochastic modeling for environmental stress screening Journal of Applied Probability, 2014, v.51 no.2, 387-399
    SCIE Scopus dColl.
  • Survival of systems with protection subject to two types of external attacks ANNALS OF OPERATIONS RESEARCH, 2014, v.212 no.1, 79-91
    SCIE Scopus dColl.
  • [학술지논문] An advanced acceptance reliability sampling plan for heterogeneous items subject to external shocks IMA JOURNAL OF MANAGEMENT MATHEMATICS, 2024, v.35 no.2 , 197-213
    SSCI
  • [학술지논문] New continuous bivariate distributions generated from shock models STATISTICS, 2024, v.58 no.2 , 437-449
    SCIE
  • [학술지논문] On the combined imperfect repair process PROBABILITY IN THE ENGINEERING AND INFORMATIONAL SCIENCES, 2024, v.38 no.2 , 341-354
    SCIE
  • [학술지논문] On the multiattempt minimal repair and the corresponding counting process APPLIED STOCHASTIC MODELS IN BUSINESS AND INDUSTRY, 2024, v.40 no.1 , 206-215
    SCIE
  • [학술지논문] Poisson generalized Lindley process and its properties METRIKA, 2024, v.87 no.1 , 61-74
    SCIE
  • [학술지논문] Preventive maintenance for the constrained multi-attempt minimal repair RELIABILITY ENGINEERING & SYSTEM SAFETY, 2024, v.243 no.1 , 109899-109899
    SCIE
  • [학술지논문] Acceptance reliability sampling plan for items from heterogeneous populations PROCEEDINGS OF THE INSTITUTION OF MECHANICAL ENGINEERS PART O-JOURNAL OF RISK AND RELIABILITY, 2023, v.237 no.6 , 1199-1208
    SCIE
  • [학술지논문] Discussion of "An overview of some classical models and discussion of the signature-based models of preventive maintenance" APPLIED STOCHASTIC MODELS IN BUSINESS AND INDUSTRY, 2023, v.39 no.1 , 82-84
    SCIE
  • [학술지논문] Improving classical optimal age-replacement policies for degrading items RELIABILITY ENGINEERING & SYSTEM SAFETY, 2023, v.236 no.1 , 109303-109303
    SCIE
  • [학술지논문] Improving the age composition of dynamic populations of manufactured items STATISTICS & PROBABILITY LETTERS, 2023, v.201 no.1 , 109879-109879
    SCIE
  • [학술지논문] On the delayed worse-than-minimal repair model and its application to preventive replacement IMA JOURNAL OF MANAGEMENT MATHEMATICS, 2023, v.34 no.1 , 101-122
    SSCI
  • [학술지논문] Optimal preventive maintenance strategy for populations of systems that generate outputs RELIABILITY ENGINEERING & SYSTEM SAFETY, 2023, v.237 no.1 , 109334-109334
    SCIE
  • [학술지논문] Termination versus operation extension for degrading systems PROCEEDINGS OF THE INSTITUTION OF MECHANICAL ENGINEERS PART O-JOURNAL OF RISK AND RELIABILITY, 2023, v.237 no.6 , 1175-1185
    SCIE
  • [학술지논문] A new class of marginally regular multivariate counting processes generated by the mixture of multivariate Poisson processes COMMUNICATIONS IN STATISTICS-THEORY AND METHODS, 2022, v.51 no.13 , 4235-4251
    SCIE
  • [학술지논문] A new warranty policy for heterogeneous items subject to monotone degradation processes PROCEEDINGS OF THE INSTITUTION OF MECHANICAL ENGINEERS PART O-JOURNAL OF RISK AND RELIABILITY, 2022, v.236 no.1 , 55-65
    SCIE
  • [학술지논문] AN EXTENDED CLASS OF UNIVARIATE AND MULTIVARIATE GENERALIZED POLYA PROCESSES ADVANCES IN APPLIED PROBABILITY, 2022, v.54 no.3 , 974-997
    SCI
  • [학술지논문] Acceptance reliability sampling plan for discrete lifetime models STATISTICS, 2022, v.55 no.6 , 1291-1309
    SCI
  • [학술지논문] Acceptance reliability sampling plan for items with two failure modes STATISTICS, 2022, v.56 no.6 , 1345-1363
    SCI
  • [학술지논문] Age-replacement policy for items described by stochastic degradation with dependent increments IMA JOURNAL OF MANAGEMENT MATHEMATICS, 2022, v.33 no.2 , 273-287
    SSCI
  • [학술지논문] Balancing load and performance for different failure models APPLIED STOCHASTIC MODELS IN BUSINESS AND INDUSTRY, 2022, v.38 no.2 , 323-333
    SCIE
  • [학술지논문] ON DEGRADATION-BASED REMAINING LIFETIME PROBABILITY IN THE ENGINEERING AND INFORMATIONAL SCIENCES, 2022, v.36 no.3 , 812-823
    SCIE
  • [학술지논문] On a hazard (failure) rate process with delays after shocks STATISTICS & PROBABILITY LETTERS, 2022, v.181 no.1 , 109276-109276
    SCIE
  • [학술지논문] On some general survival models with delayed failures COMMUNICATIONS IN STATISTICS-THEORY AND METHODS, 2022, v.51 no.22 , 7911-7928
    SCIE
  • [학술지논문] Optimal preventive switching of components in degrading systems RELIABILITY ENGINEERING & SYSTEM SAFETY, 2022, v.219 no.1 , 108266-108266
    SCI
  • [학술지논문] Reducing degradation and age of items in imperfect repair modeling TEST, 2022, v.31 no.4 , 1058-1081
    SCIE
  • [학술지논문] Replacement Policy for Heterogeneous Items Subject to Gamma Degradation Processes METHODOLOGY AND COMPUTING IN APPLIED PROBABILITY, 2022, v.24 no.3 , 1323-1340
    SCIE
  • [학술지논문] Two Reliability Acceptance Sampling Plans for Items Subject to Wiener Process of Degradation METHODOLOGY AND COMPUTING IN APPLIED PROBABILITY, 2022, v.24 no.3 , 1651-1668
    SCIE
  • [학술지논문] A general multivariate new better than used (MNBU) distribution and its properties METRIKA, 2021, v.84 no.1 , 27-46
    SCIE
  • [학술지논문] Acceptance reliability sampling plan for discrete lifetime models STATISTICS, 2021, v.55 no.6 , 1291-1309
    SCI
  • [학술지논문] On a multivariate IFR and positively dependent lifetime model induced by multiple shot-noise processes STATISTICAL PAPERS, 2021, v.62 no.2 , 561-590
    SCIE
  • [학술지논문] On degradation-based imperfect repair and induced generalized renewal processes TEST, 2021, v.30 no.4 , 1026-1045
    SCIE
  • [학술지논문] On dynamic information-based life extension PROCEEDINGS OF THE INSTITUTION OF MECHANICAL ENGINEERS PART O-JOURNAL OF RISK AND RELIABILITY, 2021, v.235 no.4 , 690-699
    SCIE
  • [학술지논문] Optimal inspection for missions with a possibility of abortion or switching to a lighter regime TOP, 2021, v.29 no.3 , 722-740
    SCIE
  • [학술지논문] Optimal warranty policy with inspection for heterogeneous, stochastically degrading items EUROPEAN JOURNAL OF OPERATIONAL RESEARCH, 2021, v.289 no.3 , 1142-1152
    SCIE
  • [학술지논문] Poisson generalized gamma process and its properties STOCHASTICS-AN INTERNATIONAL JOURNAL OF PROBABILITY AND STOCHASTIC PROCESSES, 2021, v.93 no.8 , 1123-1140
    SCIE
  • [학술지논문] Rejoinder to "Virtual age, is it real?" APPLIED STOCHASTIC MODELS IN BUSINESS AND INDUSTRY, 2021, v.37 no.1 , 45-52
    SCIE
  • [학술지논문] Variables acceptance reliability sampling plan based on degradation test STATISTICAL PAPERS, 2021, v.62 no.5 , 2227-2245
    SCIE
  • [학술지논문] Variables acceptance reliability sampling plan for items subject to inverse Gaussian degradation process JOURNAL OF APPLIED STATISTICS, 2021, v.48 no.3 , 393-409
    SCIE
  • [학술지논문] Virtual age, is it real? - Discussing virtual age in reliability context APPLIED STOCHASTIC MODELS IN BUSINESS AND INDUSTRY, 2021, v.37 no.1 , 3-16
    SCIE
  • [학술지논문] A hybrid preventive maintenance model for systems with partially observable degradation IMA JOURNAL OF MANAGEMENT MATHEMATICS, 2020, v.31 no.3 , 345-365
    SSCI
  • [학술지논문] A new general class of discrete bivariate distributions constructed by using the likelihood ratio STATISTICAL PAPERS, 2020, v.61 no.3 , 923-944
    SCIE
  • [학술지논문] Is perfect repair always perfect? TEST, 2020, v.29 no.1 , 90-104
    SCIE
  • [학술지논문] ON A MULTIVARIATE GENERALIZED POLYA PROCESS WITHOUT REGULARITY PROPERTY PROBABILITY IN THE ENGINEERING AND INFORMATIONAL SCIENCES, 2020, v.34 no.4 , 484-506
    SCIE
  • [학술지논문] On a new age-replacement policy for items with observed stochastic degradation QUALITY AND RELIABILITY ENGINEERING INTERNATIONAL, 2020, v.36 no.3 , 1132-1143
    SCIE
  • [학술지논문] On optimal life extension for degrading systems PROCEEDINGS OF THE INSTITUTION OF MECHANICAL ENGINEERS PART O-JOURNAL OF RISK AND RELIABILITY, 2020, v.234 no.3 , 487-495
    SCIE
  • [학술지논문] Stochastic modelling of operational quality ofk-out-of-nsystems TOP, 2020, v.28 no.2 , 424-441
    SCIE
  • [학술지논문] A bivariate optimal replacement policy for a system subject to a generalized failure and repair process APPLIED STOCHASTIC MODELS IN BUSINESS AND INDUSTRY, 2019, v.35 no.3 , 637-650
    SCIE
  • [학술지논문] New failure and minimal repair processes for repairable systems in a random environment APPLIED STOCHASTIC MODELS IN BUSINESS AND INDUSTRY, 2019, v.35 no.3 , 522-536
    SCIE
  • [학술지논문] Optimal preventive maintenance for systems having a continuous output and operating in a random environment TOP, 2019, v.27 no.2 , 327-350
    SCIE
  • [학술지논문] Poisson Lindley process and its main properties STATISTICS & PROBABILITY LETTERS, 2019, v.152 no.1 , 74-81
    SCIE
  • [학술지논문] Some results on discrete mixture failure rates COMMUNICATIONS IN STATISTICS-THEORY AND METHODS, 2019, v.48 no.15 , 3884-3898
    SCIE
  • [학술지논문] Stochastic modeling for systems with delayed failures RELIABILITY ENGINEERING & SYSTEM SAFETY, 2019, v.188 no.1 , 118-124
    SCI
  • [학술지논문] Stochastic modeling of quality of systems operating in a heterogeneous environment APPLIED STOCHASTIC MODELS IN BUSINESS AND INDUSTRY, 2019, v.35 no.6 , 1344-1365
    SCIE
  • [학술지논문] TRANSFORMED LEVY PROCESSES AS STATE-DEPENDENT WEAR MODELS ADVANCES IN APPLIED PROBABILITY, 2019, v.51 no.2 , 468-486
    SCI
  • [학술지논문] A dynamic bivariate common shock model with cumulative effect and its actuarial application SCANDINAVIAN ACTUARIAL JOURNAL, 2018, v.2018 no.10 , 890-906
    SSCI
  • [학술지논문] Modelling of Marginally Regular Bivariate Counting Process and its Application to Shock Model METHODOLOGY AND COMPUTING IN APPLIED PROBABILITY, 2018, v.20 no.4 , 1137-1154
    SCIE
  • [학술지논문] ON OPTIMAL OPERATIONAL SEQUENCE OF COMPONENTS IN A WARM STANDBY SYSTEM JOURNAL OF APPLIED PROBABILITY, 2018, v.55 no.4 , 1014-1024
    SCI
  • [학술지논문] On a New Shot Noise Process and the Induced Survival Model METHODOLOGY AND COMPUTING IN APPLIED PROBABILITY, 2018, v.20 no.3 , 897-917
    SCIE
  • [학술지논문] On information-based residual lifetime in survival models with delayed failures STATISTICS & PROBABILITY LETTERS, 2018, v.137 no.1 , 209-216
    SCIE
  • [학술지논문] On optimal replacement of systems with failure rates described by a random jump process QUALITY AND RELIABILITY ENGINEERING INTERNATIONAL, 2018, v.34 no.8 , 1590-1604
    SCIE
  • [학술지논문] Optimal mission abort policy for partially repairable heterogeneous systems EUROPEAN JOURNAL OF OPERATIONAL RESEARCH, 2018, v.271 no.3 , 818-825
    SCIE
  • [학술지논문] Optimal replacement policy under a general failure and repair model: Minimal versus worse than old repair RELIABILITY ENGINEERING & SYSTEM SAFETY, 2018, v.180 no.1 , 362-372
    SCI
  • [학술지논문] Stochastic comparisons and multivariate dependence for the epoch times of trend renewal processes JOURNAL OF MULTIVARIATE ANALYSIS, 2018, v.168 no.1 , 174-184
    SCI
  • [학술지논문] A Dependent Competing Risks Model for Technological Units Subject to Degradation Phenomena and Catastrophic Failures QUALITY AND RELIABILITY ENGINEERING INTERNATIONAL, 2016, v.32 no.2 , 505-517
    SCIE
  • [학술지논문] A new generalized burn-in procedure for items in stochastically evolving population APPLIED MATHEMATICAL MODELLING, 2016, v.40 no.19-20 , 8338-8351
    SCIE
  • [학술지논문] An information-based burn-in procedure for minimally repaired items from mixed population APPLIED STOCHASTIC MODELS IN BUSINESS AND INDUSTRY, 2016, v.32 no.4 , 511-525
    SCIE
  • [학술지논문] Analysis of reliability characteristics in the acceptance sampling tests JOURNAL OF APPLIED STATISTICS, 2016, v.43 no.10 , 1874-1891
    SCIE
  • [학술지논문] Dynamic mixing probability measures of mixtures COMMUNICATIONS IN STATISTICS-THEORY AND METHODS, 2016, v.45 no.16 , 4824-4839
    SCIE
  • [학술지논문] Justifying the Gompertz curve of mortality via the generalized Polya process of shocks THEORETICAL POPULATION BIOLOGY, 2016, v.109 no.1 , 54-62
    SCI
  • [학술지논문] Maintenance Policy for a System With Stochastically Dependent Failure Modes With Shock-Accumulation Effect IEEE TRANSACTIONS ON RELIABILITY, 2016, v.65 no.3 , 1284-1297
    SCIE
  • [학술지논문] New stochastic models for preventive maintenance and maintenance optimization EUROPEAN JOURNAL OF OPERATIONAL RESEARCH, 2016, v.255 no.1 , 80-90
    SCIE
  • [학술지논문] On Ageing Concepts for Repairable Items From Heterogeneous Populations IEEE TRANSACTIONS ON RELIABILITY, 2016, v.65 no.4 , 1864-1870
    SCIE
  • [학술지논문] On information-based warranty policy for repairable products from heterogeneous population EUROPEAN JOURNAL OF OPERATIONAL RESEARCH, 2016, v.253 no.1 , 204-215
    SCIE
  • [학술지논문] Optimal Long-Run Imperfect Maintenance With Asymptotic Virtual Age IEEE TRANSACTIONS ON RELIABILITY, 2016, v.65 no.1 , 187-196
    SCIE
  • [학술지논문] Optimal Replacement of Heterogeneous Items With Minimal Repairs IEEE TRANSACTIONS ON RELIABILITY, 2016, v.65 no.2 , 593-603
    SCIE
  • [학술지논문] POINT PROCESS APPROACH TO MODELING AND ANALYSIS OF GENERAL CASCADING FAILURE MODELS JOURNAL OF APPLIED PROBABILITY, 2016, v.53 no.1 , 174-186
    SCI
Courses
  • 2024-1st

    • Insurance Statistics

      • Subject No 35977Class No 01
      • 4Year ( 3Credit , 3Hour) Mon 6~6 (POSCO453) , Wed 5~5 (POSCO453)
    • Stochastic Process

      • Subject No G11813Class No 01
      • Year ( 3Credit , 3Hour) Mon 7~8 (POSCO-453)
      • Classroom Changed
  • 2023-2nd

    • Sampling Survey Methods

    • Selected Topics in Stochastic Processes Ⅰ

      • Subject No G11895Class No 01
      • Year ( 3Credit , 3Hour) Mon 7~8 (POSCO-452)
      • Classroom Changed
  • 2023-1st

    • Insurance Statistics 강의 계획서 상세보기

      • Subject No 35977Class No 01
      • 4Year ( 3Credit , 3Hour) Mon 6~6 (POSCO453) , Wed 5~5 (POSCO453)
    • Selected Topics in Stochastic Processes Ⅱ

      • Subject No G11822Class No 01
      • Year ( 3Credit , 3Hour) Mon 7~8 (POSCO-453)
  • 2022-2nd

    • Sampling Survey Methods

      • Subject No 30219Class No 01
      • 3Year ( 3Credit , 3Hour) Mon 6~6 (POSCO453) , Wed 5~5 (POSCO453)
    • Non-life Insurance Mathematics

      • Subject No G16358Class No 01
      • Year ( 3Credit , 3Hour) Mon 7~7 (D108) , Wed 7~7 (D108)
  • 2021-1st

    • Insurance Statistics

      • Subject No 35977Class No 01
      • 4Year ( 3Credit , 3Hour) Mon 4~4 , Thu 5~5
    • Insurance Statistics

      • Subject No 35977Class No 02
      • 4Year ( 3Credit , 3Hour) Mon 9~9 , Thu 9~9
    • Life Insurance Mathematics

      • Subject No G16357Class No 01
      • Year ( 3Credit , 3Hour) Mon 6~7 (D106)
Academic Background

Seoul Nat'l Univ. 이학박사(통계학과)

Seoul Nat'l Univ. 이학석사(계산통게학과)

Seoul Nat'l Univ. 이학사(계산통계학과)